Terahertz wavefront control by graphene metasurface

Takumi Yatooshi, Atsushi Ishikawa, Kenji Tsuruta

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We propose and numerically investigate a tunable metasurface made of an array of graphene ribbons to dynamically control terahertz (THz) wavefront. The metasurface consists of graphene micro ribbons on a silver mirror with a SiO2 gap layer. The graphene ribbons are designed to exhibit localized plasmon resonances depending on their Fermi levels to introduce abrupt phase shifts along the metasurface. With interference of the Fabry-Perot resonances in the SiO2 layer, phase shift through the system is largely accumulated, covering up to 2jt range for full control of the THz wavefront. Numerical simulations prove that wide-angle reflected THz beam steering from -53° to +53° with a high reflection efficiency as high as 60% is achieved at 5 THz while the propagation direction of THz beam could be switched within 0.6 ps.

Original languageEnglish
Title of host publicationLight-Matter Phenomena - From Atoms to Complex Structures
PublisherChinese Materials Research Society
Pages37-42
Number of pages6
Volume1788
ISBN (Electronic)9781510826427
DOIs
Publication statusPublished - 2015
Event2015 MRS Spring Meeting - San Francisco, United States
Duration: Apr 6 2015Apr 10 2015

Conference

Conference2015 MRS Spring Meeting
CountryUnited States
CitySan Francisco
Period4/6/154/10/15

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ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Yatooshi, T., Ishikawa, A., & Tsuruta, K. (2015). Terahertz wavefront control by graphene metasurface. In Light-Matter Phenomena - From Atoms to Complex Structures (Vol. 1788, pp. 37-42). Chinese Materials Research Society. https://doi.org/10.1557/opl.2015.730